One of the most influential niche constructors is the earthworm, an organism found almost everywhere on the planet. 1 A scientist only concerned with evolution would predict that, in order to live on land, earthworms would have to significantly change. Earthworms didn’t change their physiology a great  amount, however, instead, they changed the soil to make it more like the ocean in order to survive. Land with earthworms is less compacted, is more nutrient rich, and better mixed than land without them – leading to monumental changes in the ecosystem.

For thousands of years, cooking was considered more of a practice than a science. Much of what chefs and food scientists alike knew about cooking came from conventional wisdom rather than carefully designed research. For individuals who considered cooking to be an art rather than a science, this seemed to be for the best; however, for physicist Nicholas Kurti and chemist Herve This, the lack on empirical knowledge around what we eat was not just an affront to science. It was a challenge. In 1988 the pair coined the term “molecular gastronomy,” which they defined as the investigation of the physical and chemical transformation that ingredients undergo during the course of cooking. They argued that if chefs understood these processes, they could produce dishes improved by the findings. 1

The Sagrada Familia has stood, incomplete, as part of the Barcelona skyline since the early phases of its construction in 1882. The project, originally intended to be a cathedral in the gothic style, was begun by the bookseller Joseph Maria Bocabella under the direction of the architect Francisco de Paula del Villar. Del Villar and Bocabella imagined a basilica modeled on the Gothic revival churches Bocabella had seen on trips to Italy. However, Bocabella’s ideal basilica never came to be. In 1883 del Villar resigned from the project, and 30-year old Antoni Gaudi, a young but already well-known architect from Catalonia, took over as lead architect.

Gaudi decided to depart from del Villar’s original Gothic design in favor of a more modern design. The new design was ambitious, featuring eighteen tall spires and four different facades on different sides of the basilica. But work on the new building was slow. Decades passed, and the work was still incomplete. In 1915, Gaudi - now 63 years old - abandoned all other work in favor of dedicating himself to the completion of the monumental church, but progress on the building was still slow. When pressured to speed up work on the monumental building, Gaudi was said to have replied, “My client is not in a hurry.” By the time Gaudi died in 1926, the basilica was only somewhere between 15 and 20 percent complete. 

After Gaudi’s death, work stalled between 1936 and 1940 when Civil War broke out in Spain and again as World War II began, leaving the project years behind schedule. During the wars, Catalan anarchists destroyed part of the basilica and the models and designs Gaudi left for the builders, who were forced to reconstruct what plans they could, an arduous and time-consuming process. It took years for the project to get back on track; once it was, it was impossible to know whether additional construction would match Gaudi’s vision.

The Sagrada Familia, one of the most iconic structures in Barcelona, remains unfinished, a constant work-in-progress in the Barcelona skyline. Despite these setbacks, it is open to the public for both religious services and tourism, attracting over three million visitors a year. In fact, tourist entrance fees now pay for annual construction costs. 1

One of the most influential niche constructors is the earthworm, an organism found almost everywhere on the planet.  A scientist only concerned with evolution would predict that, in order to live on land, earthworms would have to significantly change. Earthworms didn’t change their physiology a great  amount, however; instead, they changed the soil to make it more like the ocean in order to survive. Land with earthworms is less compacted, is more nutrient rich, and is better mixed than land without them – 1 leading to monumental changes in the ecosystem.

Niche constructors are particularly important in colonizing new environments. One of the easiest ways to measure this effect on evolution has been in the effect that the number of earthworms has on soil fertility, a measure of how hospitable an environment is to plant growth. Even the least fertile soil has around 62 worms per square meter, and as the number of worms increases so does soil fertility. As worms move through the different layers of soil, they eat, digest, and excrete massive amounts of organic matter. They leave their excretions behind in the form of nutrient-rich droppings known as casings. As these casings decompose, they release nutrients into the soil. This process not only moves nutrients from one layer of the soil to another but also converts the nutrients to forms that plants can absorb and process more easily. Because it is easier for plants to get the proper nutrients, plants don’t have to invest time and energy into making better root systems to gather nutrients. As a result, plants have, over time, lost some of these mechanisms – a form of evolution. 

The public’s perception of archaeologists has, for years, been colored by depictions of the profession in movie franchises like Indiana Jones, Tomb Raider, and The Mummy. However popular these movies are, they– like movies that depict any other profession – don’t necessarily reflect what archaeologists actually do. While fighting supernatural forces and foiling nefarious plans does make for a better movie, 1 archaeologists are interesting people.

One of the most influential niche constructors is the earthworm, an organism found almost everywhere on the planet.  A scientist only concerned with evolution would predict that, in order to live on land, earthworms would have to significantly change. Earthworms didn’t change their physiology a great  amount, however; instead, they changed the soil to make it more like the ocean in order to survive. Land with earthworms is less compacted, is more nutrient rich, and is better mixed than land without them –  resulting in a moist environment in which the worms can thrive.

1 Niche constructors are particularly important in colonizing new environments. One of the easiest ways to measure this effect on evolution has been in the effect that the number of earthworms has on soil fertility, a measure of how hospitable an environment is to plant growth. Even the least fertile soil has around 62 worms per square meter, and as the number of worms increases so does soil fertility. As worms move through the different layers of soil, they eat, digest, and excrete massive amounts of organic matter. They leave their excretions behind in the form of nutrient-rich droppings known as casings. As these casings decompose, they release nutrients into the soil. This process not only moves nutrients from one layer of the soil to another but also converts the nutrients to forms that plants can absorb and process more easily. Because it is easier for plants to get the proper nutrients, plants don’t have to invest time and energy into making better root systems to gather nutrients. As result, plants have, over time, lost some of these  mechanisms – a form of evolution. 

The pair brought scientific thinking and equipment to the kitchen, challenging perceptions about what belonged in the lab and what belonged in a chef ’s kitchen. For example, an early experiment in pie baking involved injecting pies with a syringe full of liquid after baking in order to preserve the crust. Other experiments involved creating meringue (cooked whipped egg whites with sugar) in a vacuum chamber and a “reverse” baked Alaska (ice cream topped with meringue) with the hot merengue on the inside and the ice cream on the outside. Although the experiments themselves might not have been useful to the home cook, 1 they were interesting for scientists.

Since 1988, the mission of molecular gastronomy has shifted. Kurti and This originally sought to investigate “kitchen old wives’ tales,” invent new recipes, improve old ones, and make the case to the public that science was a useful part of everyday life. Even if their experiments weren’t intended to be replicated in home kitchens, they were intended to encourage home cooks to experiment. Today, molecular gastronomists seek to explore the social, artistic, and technical aspects of food preparation. Some have argued that this shift in focus, along with the fact that techniques in molecular gastronomy have so far surpassed what any home cook could do, means that molecular gastronomy has lost 1 the ability to impact homemade food.

[1] The job of CRM archaeologists is to identify the potential cultural significance of a site and then document and preserve any artifacts of historical or cultural significance. [2] The surplus of people who want to work in archaeology has meant that the majority of archaeologists aren’t employed by universities or museums, but by construction companies and the government.  [3] Most archaeology positions in today’s economy are for what are referred to as a “cultural resource management” archaeologists, or CRM archaeologists, who are often involved in building projects as representatives of the state, Native American tribes, and historical societies. [4] While part of this analysis might involve starting a dig at the site in question to find relevant artifacts, much of this research process requires CRM archaeologists to consult historical records and talk to members of the community where the building process has been proposed. 1

For the sake of the logic of the passage, sentence 1 should be placed

The Sagrada Familia has stood, incomplete, as part of the Barcelona skyline since the early phases of its construction in 1882. The project, originally intended to be a cathedral in the gothic style, was begun by the bookseller Joseph Maria Bocabella under the direction of the architect Francisco de Paula del Villar. Del Villar and Bocabella imagined a basilica modeled on the Gothic revival churches Bocabella had seen on trips to Italy. However, Bocabella’s ideal basilica never came to be. In 1883 del Villar resigned from the project, and 30-year old Antoni Gaudi, a young but already well known architect from Catalonia, took over as lead architect.

[1] By the time Gaudi died in 1926, the basilica was only somewhere between 15 and 20 percent complete. [2] Gaudi decided to depart from del Villar’s original Gothic design in favor of a more modern design. [3] The new design was ambitious, featuring eighteen tall spires and four different facades on different sides of the basilica. [4] But work on the new building was slow. [5] Decades passed, and the work was still incomplete. [6] In 1915, Gaudi - now 63 years old - abandoned all other work in favor of dedicating himself to the completion of the monumental church, but progress on the building was still slow. [7] When pressured to speed up work on the monumental building, Gaudi was said to have replied, “My client is not in a hurry.”